Ice, wind, water, gravity, plants, and animals are ALL causes of... a) Chemical weathering
b) Mechanical weathering
c) Oxidation
d) Mass movement

What word is used to describe differences of individual organisms

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red.b) the pollen grains will be pure blue.c) the pollen grains will have red interiors and blue exteriors.d) the pollen grains will have blue interiors and red exteriors.

What materials must dams have to produce electricity, and what must occur?